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(No Model.) 4 sheets-sheet 1. T. W. CPEN.

TRAVBLING CRANE.

No. 263,479. Patented Aug. 29, 1882.

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(No Model.) 4 Sheets-*Sheet 2. T. W. CAPEN.

TRAVELING CRANE.

No. 263,479. Patented Aug. 29, 1882.

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(No Model.) 4 Sheets-Sheet 3. T.' W. CAPEN.

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(No Model.) 4 Sheets-Sheet 4 T. W. CAPEN.

TRAVBLING GRANB.

No. 263,479. Patented Aug. 29, 1882.

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Unire@ STATES arnNr irren.

THOMAS lV. CAPEN, OF STAMFORD, CONNECTICUT, ASSIGNOR vTO THE YALE LOCKMANUFACTURINGPCOMPANY, OF SAME PLACE.

TRAVELING CRANE.

SPECIFICATION forming part of Letters Patent N0. 263,479, dated August29, 1882,

.application fried July 2o, 1882. (No modem To all whom it may concern:

Be it known that I, THOMAS W. CAPEN, o Stamford, in the countyot'Fairtield and State ot' Connecticut, have invented certain new anduseful Improvements in Traveling Cranes, of which the following is aspecification.

The object of my invention is to improve the construction andorgani'zltion of parts of the crab of a traveling' crane of the kind setforth in the United States Patent of Thomas A. Veston, No. 198,718,granted December 25, 1877, and to provide an automatic brake to preventthe running down ofthe load, which may be applicable also in connectionwith other hoisting machines, especially where a worm and worm-wheelareemployed.

In the accompanying drawings, Figure l is a top view of the crab, partlybroken away. Fig. 2 is a side view of the same. Fig. 3 is an end view.Fig. et is a central vertical section on the line 4 d of Figs. l and 2.Fig. 5 is a central view on the line 5 5 of Figs. l and 4. Fig. 6 is aside view otI one of the shafts andV worms detached, showing the casingin section. Fig. 7 is a central longitudinal section of the same'. Fig.8 is an end elevation ofthe crab resting upon its bridge, showing aportion ot' one opt' the tracks which support the bridge and the pendingpull-chains and hoisting-chains; and Fig. 9 is a side elevation of thecrab and pending chains, showing a portion ot' the bridge.

A indicates a traversinghand-wheel, and A its pull chain or rope. Bindicates another traversing hand-wheel, and B its pull chain or rope.Fixed cables and their sheaves are partially shown in Figs. S and 9.Pulling upon one side of these pull-chains will cause the crab to travelin one direction upon the bridge, and pulling on the other side of thesechains will cause the crab to travel in the opposite' direction on thebridge. By pulling diagonally opposite sides of these chains the bridgeis caused to travel in one direction on its tracks, and by pulling theopposite diagonal sides of the chains the bridge is caused to travel inthe opposite direction on its tracks. By pulling on one side of one ofthese opposite chains,whilc the other chain remains at rest, the craband bridge will both move, giving a diagonal lnotion to the load in onedirection, and by pulling on the other side of the chain the crab andbridge will both move, causing an opposite diagonal movement of theload. these traversing hand-wheels and pending pull-chains and the twointersecting iiXed cables and their sheaves, described in the saidpatent of Thomas A. Weston, the crab and bridge are moved separately ineither direction, the crab on its bridge and the bridge on its tracks;or both crab and bridge may be moved simultaneously in either direction,giving a diagonal resultant motion to the load, whereby the load may heplaced by the operator at will in any desired position within the areabounded bythe two tracks which support the bridge. I claim nothing,however, with respect to these movements and this result, but simplyrefer to them and to the said patent of Thomas A. \Veston, where theyare fully described, by way ot' making my improvements clearlyunderstood by reference to operating parts in connection with which theyare employed and with which they are organized.

C indicates a large hand-wheel operated by means of the pull chain orrope C, and D a small hand-wheel operated by means of the pullchain orrope D. Each ot' these handwheels is secured to a shaft, E, on the innerend of which is a worm, E', beyond which is the inner housing of theshaft. Each worm engages with a worin-wheel, F, which is rigidlyconnnected with a chain-wheel, F. The endless hoisting-chain Gr passesdown on one side of one of the pocketed chain-wheels and up 0n the otherside of the other, forming two loops, one for the slack and the otherfor the block H, which hangs in a diagonal position.

From the foregoing it will be seen that by rotating either of thehand-wheels the corresponding chain-wheel will raise or lower one partot' the hoisting-chain and lift or lower the Thus by means ot' load, thechain being pockcted in its wheels,

so that it cannot slip. The different diameters of these hand-wheels,when used alone, give two different speeds for hoisting and lowering,the small Wheel and its pull-chain being' used for light weights andquick speeds and the IOO 6 5 any slipping that takes place will takeplace l large wheel andits pull-chain for heavy weights and slow speeds.Pulling upon one side of either of these chains lowers the load andpulling upon the other side raises it. Pulling upon corresponding sidesof both chains at the same time will give the sum of the speeds of both,either for raising or lowering the load. Pulling upon opposite sides ofboth at the same time will give a differential resultant speed, eitherfor raising or lowering the load. Thus four different speeds of eitherraising or lowering the load are obtainable.

Referring to the automatic brake, it will be seen that each worm-shaft Eis dividedinto two parts atI for the purpose of applying the brake. Tothe exterior part, or that to which the handwheel is secured, islrigidly attached a driver, K. This driver, as shown enlarged in Figs. 6and 7, consists of a hollow cylinder, with a halfcylindrica-l sectioncut away from the point L to its inner end; but its form may bemoditied. 'Io the extension or inner part of the shaft isrigidlyattached a collar, M, which has a projeetinglug,N. Next to thiscollaris a loose collar, O, provided with a projecting lug, P. Theextreme inner end ofthe shaft is provided with a bearing, Q, and isprevented from longitudi nal motion outward by the fixed collar R orotherwise. 'lhe adjacent faces of the fixed collar M and the loosecollar 0 are inclined, as illustrated. Only a single incline is shown;but the incline might be double-that is to say, there might be twoinclinesin opposite directions.

'lhe operation of this brake mechanism is as follows: Then the outerpart ot' the shaft is revolved the driver K turns around until it picksup the collars M and by means of the lugs N and P, which are in suchposition that the inclined adjacent faces of the collars tit together,so as to make collars M and 0 practically one piece when the lugs are inoperation. rIhe result is that both parts of the shaft turn freely, theworm is revolved, and the worm-wheel is rotated. Motion in the contrarydirection will produce a similar effect, the lugs engaging on oppositesides. Now, the load can only run down by turning the inner part of theshaft through the force of the load applied to the chain-wheel andcommunicated to the worm-wheel and worm. As soon as motion from such acanse takes place the fixed collar M will begin to turn; but there willbe nothing to turn the loose collar 0. The result will be that theinclines will begin to climb up one on the other, which will make apinch between the collars M and It, because the climbing ofthe inclineswill cause the collar M to push inward on the collar 0 and force itagainst the end of the shaftfbearing at w. The farther the worm turnsthe harder this push will be until friction brings everything to a stop.The collar O is made of greater' diameter' on one side than on theother, so that on the incline and cause the climbing and pinching abovedescribed. \Vith a single incline this action will only take place whenthe worm is turned in one direction; but with a double incline anymotion proceeding from the worm would be arrested by the brake at once.0f course in a crane the motion would only be from the running downofthe load; but there are some cases where there will he a hook ateither end of the chain, and in such cases a double incline may be used,being only a dnplicate in principle and construction of thatillustrated, and therefore not necessary to be further explained. Thus Iprovide that any motion ot' the shaft in either direction, produced bythe hand-wheel, will lift or lower the load, and any motion ot' theinner part of the shaft, produced by running down ofthe load, willimmediately cause a strain against the ends of the inner shaft-bearings,such as easily to resist the rotation of the shaft caused by the load,or by any force operating primarily upon the inner end of the shaftinstead of the outer end.

Having thus described my improvements, what I claim as new, and desireto secure by Letters Patent, is-

1. The combination of the two hand-wheels C and D and their pull-chainswith the worms, worm wheels, chain wheels, and hoistingchain, wherebyfour different speeds ot' hoisting and of lowering maybe obtained,substatitially as set forth.

2. In a crab for a traveling crane, the combination of worm-wheelhoisting mechanisms and traversing mechanism, substantially as setforth.

3. The combination of the two parts of the shaft E with the driver andthe fixed collar M and loose collar O, adapted to le engaged by thedriver to turn the shaft in either direction, substantially as setforth.

4. The combination of the two parts of the shaft E with the driver andthe fixed and loose collars M and 0, adapted to be engaged by the driverto turn the shaft, the adjacent faces of the collars being inclined, assetforth, and the part of the shaft carrying the collars being heldagainst longitudinal motion, slibstantially as set forth.

5. The combination of the shaft and the fixed and loose collars M and O,having inclined adjacent faces, and so constructed and arranged that theloose collar is wedged against a tirm stop in operation andthe shaft isheld against longitudinal movement, whereby a brake is ap plied to stopits rotation, snbstaiitially as set forth.

In testimony whereof I have hereunto subscribed my name.

THOMAS W. GAPEN.

Witnesses:

H. S. MoGoNKEY, SCHUYLER MERRrr'r.

IOS

IIO

